Adjustable air-damper for stovepipes.



V. B. JENSEN.

ADJUSTABLE AIR DAMPER FOR STOVEPIPES.

APPLICATION FILED SEPT. 11. I915.

1.173975. Patented Feb. 29,1916.

2 SHEETSSHEET I.

* LEI/b502 3 Jensen V. B. JENSEN.

ADJUSTABLE AIR DAMPER FOR STOVEPIPES.

APPLICATION FILED SEPT- 1 1, 1915.

1,173,975. Patented Feb. 29, 1916.

2 SHEETS-SHEET 2- THE COLUMBIA PLANOURAPH co-. WASHINGTON, D. c,

STATES VICTOR B. JENSEN, or CAYUGA, NORTH DAKOTA.

Specification of Letters Patent.

Patented Feb. 29, 1916.

Application filed'september 11, 1915. Serial No. 50,257.

e To all whom it may concern:

' Be it known that I, VIo'roR B. JENSEN, a

V citizen of the United States, residing at Cayuga, in the county of Sargent and State of North Dakota, have invented new and useful Improvements in Adjustable Air- Dampers for Stovepipes, of which the following is a specification.

The invention relates to a stove damper,

and more particularly to the class of adjustable air dampers for stove pipes.

The primary object of the invention is the provision of a damper of this character wherein the required amount of air can be admitted into the stove pipe.

Another object of'the invention is the provision of a damper of this character that can be readily and conveniently adjusted with despatch, and will assure the perfect combustion of the fuel within the stove.

' A further Object of the invention is the provision of a damper of this character which is simple in construction. thoroughly reliable and eflicient in operation and inexpensive in manufacture and installation.

With these and other objects in view, the invention consists in the construction, combination and arrangement of parts as will be hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereunto appended.

In the drawings :Figure 1 is a fragmentary side elevation of a stove pipe showing the damper constructed in acc rdance with the invention applied. Fig. 2 is a vertical longitudinal sectional view therethrough. Fig. 3 is a sectional view on the line 3-3 of Fig. 1. Fig. 4 is a view looking toward the outer end of the damper. vertical longitudinal sectional view through the damper showing the same adjusted.

Similar reference characters indicate corresponding parts throughout the several views in the drawings.

Referring to the drawings in detail. A designates a portion of a stove pipe or flue connected with and leading from a stove, as usual. and in this pipe is mounted the adjustable air damper hereinafter fully described.

The air dam er comprises a cylindrical body 10 wh ch is arranged within the stove pipe A and is formed with a closedinner end 11. while its opposite end is reduced at 12 to form an open extension which protrudes through a correspondingly shaped Fig. 5 is a opening in the side of the stove pipe to the exteriorthereof. The reduced end 12 of the body 10 forms a shoulder 13 which contacts wlth the inner'face of the stove pipe concentrically about-the opening through which the extension protrudes, while encircling this extension is a securing ring 14 which contacts with the outer side of the stove pipe A and has passed therethrough screw members 15 which fasten thebo'dy securely within the stove pipe.

Slidably fitted in the reduced extension 12 at the outer end of the body is a cylinder 16 which is open at its inner end, while at the outer end is a damper head 17,and in the sides of this cylinder are formed openings 18 so that on moving the cylinder outwardly of the body the openings will communicate with the atmosphere for admitting air therethrough to the body, the cylinder being moved in a manner presently described. Mounted on thebody 10 at its uppermost point is an air outlet nipple or tube 19 which discharges the air from the atmosphere interiorly of the stove pipe when the cylinder 16 has been moved outwardly for the admission of air from the atmosphere through the openings 18 in the side thereof into the body, it being apparent that the suction created within the stove pipe A will draw the atmospheric air through the-openings 18 in the cylinder 16 interiorly of the body.

Fixed interiorly of the cylinder 16 longitudinally thereof is a toothed rack 20 with which meshes a cog gear 21 fixed to a shaft 22 suitablv journaled in the reduced extension 12 of the body 10. and this shaft is formed with a crank handle 23 without the body so that it can be manually rotated for the moving of the cvlinder 16 to bring its head 17 into position for closin the reduced extension 12 and shutting off the communication of the openin s 18 with the atmos here. This head 17 is in the form of a disk and constitutes a closure serving as a damper. When it is desired to effect a draft in the sto e pipe A the cvlinder 16 is moved outwardlv of the bodv 10 exposing the o enings for the communication thereder 16 when moved inwardly in the body 10 brings the damper headcor disk 17 into engagement with the'outerfree edge of the reduced extension 12 of the body, thereby closing the openings 18 which will be confined within the body, and thus shutting ofl draft to the stove pipe.

From the foregoing description, taken in connection with the accompanying drawings, the construction and'manner of operation of the device will be clearlyunderstood, and therefore a more extended 'ex- 7 planation has been omitted.

a'damper comprising a hollow body mount- What is claimed is 1. The combination with a stove pipe, of

ed interiorlyof the said pipe and having a closed inner end, an outlet nipple on the said body and within the stove pipe, a re-' 'duced extension on the, outer end of the body and protruding Without the stove pipe, a" cylinder slidable through the reduced extension and being open at its inner end and having a damper head at its outer end to provide a closure for the outer end of the reducedextension, the said cylinder being provided with openin s next to the head,

and means for operating the cylinder for moving the same outwardly or inwardly relative to the body. p

'2. The combination with a stove pipe,- of a dampercomprising a hollow body mount ed interiorly of the said pipeand having a closed inner end,an outlet nipple on the said body and" within the Stovepipe, a re duced extension on'the outer end of the .body and protruding Without the stove pipe,

a cylinder slidable through :thet'reduce'd extension and being open at its inner end and having a damper head at its outer end to provide a closure for the outer end'of the In testimony'whereof I aflix my signature in presence of two witnesses.

Witnesses:

' EDWIN PEDERSON,

' E. J. Fys'rnoir;

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of-Patents,

' i Washington, D. G. 1 I

"VICTOR. B. JEN EN;- 

